A wide open space (It could be your backyard or a park.) Two Hula-Hoops (Alternatively, you could use two flat rocks or bricks that you can sit on.) A yardstick or meterstick (Use one that has clear ...

Have you ever wondered how astronomers measure the distance to other objects in the universe? How do they make claims that this nebula is 1,500 light years distance or that galaxy is 2.5 million light ...

For the first time, astronomers have directly measured the distance to a spot clear across the galaxy. The established but challenging technique promises a new way to map the structure of the Milky ...

How do scientists calculate the distance from Earth to a star or galaxy? originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique ...

Recently the Sloan Digital Sky Survey (SDSS) has completed the largest map of the universe thus far. The map focuses on the positions of quasars. These objects are powered by supermassive black holes ...

Determining distance is one of astronomy’s greatest challenges. For nearby objects, astronomers rely on parallax, which causes nearby stars to shift against the seemingly stationary background of more ...

Try this experiment: extend your thumb at arm’s length and close one eye at a time. Your thumb will seem to ‘jump’ between two positions as you switch the eye that is closed. That jump is known as ...

THE determination of stellar distances is fundamental to the investigation of the sidereal universe. When once the distance of a star is known, we can calculate its transverse speed in kilometres a ...

For the first time, astronomers have directly measured the distance to a spot clear across the galaxy. The established but challenging technique promises a new way to map the structure of the Milky ...